To use USB printer you have to install driver properly shipped with your printer. And also the driver must match your operating system. As I know dv6000 comes with Vista loaded operating system, so if also on your machine vista is loaded, then you have to install printer driver for vista from your printer CD.
Also don't attach any printer cable to the machince i.e. to the computer before installation. After successfull install acttached the USB cable properly and it should work.

if still any problem or confusion, just ask me I will try to help you.

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try to completely scan your computer with good antivirus. Uninstall Photosmart and make sure you have completely remove it.Delete the Photosmart's folder remained in c:\Program files. After, install again your printer.